如何在scp期间禁用CTRL-C？

Question

I want my script to be able to finish an scp , even if CTRL + C is entered. I have tried using a trap to disable CTRL + C , but it does not work when the scp is in progress. The scp terminates immediately. Is there any way to do this? Code is below. Pretty simple.

#!/bin/bash
trap '' SIGINT SIGTERM
scp -q user@server:/backup/large_file.txt /local/dir/

UPDATE: Also make sure you have "set -m" at the top of your script.

Answer 1

Put it in the background in a subshell to disconnect it from the terminal.

(scp ... &)

EDIT: You'll probably want to redirect any errors to a file.

Answer 2

Another method is to disable the key interrupt completely until the transfer is done:

#!/bin/bash
STTY=$(stty -g)                        # Save settings
stty intr undef                        # Disable interrupt
echo -n "Press ENTER to continue: "    # Do your file transfer here
read response
stty ${STTY}                           # Restore settings

Answer 3

If you want to send it to background and be able to get the process in foreground again use this:

$ ( sleep 10 ; echo hello ) &
[1] 1323
$ jobs
[1]  + running    ( sleep 10; echo hello; )
$ kill %1
$
[1]  + 1323 terminated  ( sleep 10; echo hello; )
$ $
$ ( sleep 10 ; echo hello ) &
[1] 1325
$ jobs
[1]  + running    ( sleep 10; echo hello; )
$ fg %1
[1]  + 1325 running    ( sleep 10; echo hello; )
^C
$

So you can send the progress in the background with & and see all background tasks with jobs and you can access it with %1 and kill it with kill and get it to the foreground with fg .